Process of making hydraulic cement.



PATENTED APR. 16, 1907.

E. MUELLER. PRUOESS OF MAKING HYDRAULIC 0E MBNT.

APPLICATION FILED FEB. 11. 1907.

I'VVENTOR LLER EMIL MUE ATTORNEYS entering the kiln.

UNITED STATES PATENT oEEIoE.

EMIL MUELLER, OF ALSEN, NEW YORK.

PROCESS OF MAKING HYDRAULIC CEMENT- N0. 850,?"78. Specification ofLetters Patent. Patented April 16, 1907. Application filed ebruary 11,1907. Serial No. 856,746.

To all whom it may concern: neously along with the coal into the kiln B.

Be itknown that I, EMIL MUELLER, a citi- The percentage of flux usedwith the powzen of the United States, residing at Alsen, in dered coalvaries from a fraction of one per the county of Greene and State of NewYork, cent. to five or six per cent.

5 have invented a new and useful Im rove- The kiln may be. of therotating type or ment in Processes of Making Hydrau ic Ceany other type,and the mixture of pulverment, of which the following isa specificaizedfuel may be fed into it'as follows: A slid tion. ing tube R is arrangedtelescopically over the My invention is in the nature of a noveldischarge end of the conveyer-tube, and a to process of making hydrauliccement; and it sliding ring K behind the tube 'R serves the consistsmixing together pulverized coal purpose of re alting the supply of air,the and a pulverized flux and feeding the mixopenings 0 a1 owing the airto be forced diture simultaneously into the kiln for oalcinrectly intothe conveyer.

mg the cement clinker, the admixture of flux If the materials are to befed by com:

I 5 with the coal and its diffusion and immediate pressed air, then theform of device shown in action throughout the kiln serving to caloineFigs. 2 and 3 will be used. In this case the the cement at a lowertemperature and in a conveyer'instead of bein in line with the shortertime. The fluxes which I employ are longitudinal axis of the ki n is atright angles calcium fluorid, iron ore, chrome'ore, silica, to the axis,and the conveyer A ischarges 2o blast-furnace sla or any otherwell-known into a box from which a spout F enters the fluxes. The coaand the fluxes may be kiln, while a concentric nozzle E from an airmixedby simultaneously grinding them toblower supplies the blast of air. Thefluxis gether, or the coal may be ground alone and also fedfromits'hopper S by a short auxilthe flux added thereto and mixed justbefore iary conveyer W, mounted above the con- Figure 1 is a sectionalelevation of a simple I claimapparatus for mixing theseparately-ground 1. The process of facilitatlng the ,calc namaterialsand feeding them into the kiln. tion of cement clinker, which consistsin inti- Fig. 2 is a similar view of an apparatus for mately mixing acarbonaceous fuel and apul- 3o feeding the material with compressed alr,verized flux and simultaneously introducing and F' 3 is a section online 3 3 of Fig. 2. them into the calcining-kiln.

In t e drawings, C is a bin in which is 2. The process of facilitatingthe calc neplaced the round coal and from which the tion of cementclinker, which conslsts 1n 1nt1- round coa is fed by' a tubular conveyermately mixing pulverized coal and a pulver- 35 ,having aslowly-rotatingfeedscrew thereized flux and simultaneously introducing m. S is a secondsmaller bin or hopper them intothecalcinm -k1ln. which is tapped intothe screw-conveyer 3. The process of-facilitating the calamacase at asuitable point along its length and tion of cement clinker, whichconsists in intiis provided with a regulatin gate, valve, mately mixingulverizedcoal and calcium 40 or screw conveyer, as herea ter described.fluorid and s'imu taneously introducing them Into this bin is placed thepulverized or into the calcining-k1 ground flux, which slowly dischargesinto the 1 EMIL MUELLER. screw conveyer and is therein mixed with theWitnesses: pulverized coal in a more or less homogene- H. M. MINER, 45ous manner and is then discharged simulta- K. G. GLOV'ER.

veyer A and at right angles to 1t. 70

